Composer install Laravel：无法将您的要求解析为一组可安装的软件包

Question

我第一次尝试使用 Composer 安装Laravel。

根据 https://laravel.com/docs/5.1 上的文档，我尝试使用命令 sudo composer global require "laravel/installer"。

我得到的输出粘贴在下面：

Changed current directory to /home/israel/.composer
Using version ^2.0 for laravel/installer
./composer.json has been created
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - laravel/installer v2.0.1 requires ext-zip * -> the requested PHP extension zip is missing from your system.
    - laravel/installer v2.0.0 requires ext-zip * -> the requested PHP extension zip is missing from your system.
    - Installation request for laravel/installer ^2.0 -> satisfiable by laravel/installer[v2.0.0, v2.0.1].

  To enable extensions, verify that they are enabled in those .ini files:
    - /etc/php/7.2/cli/php.ini
    - /etc/php/7.2/cli/conf.d/10-opcache.ini
    - /etc/php/7.2/cli/conf.d/10-pdo.ini
    - /etc/php/7.2/cli/conf.d/15-xml.ini
    - /etc/php/7.2/cli/conf.d/20-calendar.ini
    - /etc/php/7.2/cli/conf.d/20-ctype.ini
    - /etc/php/7.2/cli/conf.d/20-curl.ini
    - /etc/php/7.2/cli/conf.d/20-dom.ini
    - /etc/php/7.2/cli/conf.d/20-exif.ini
    - /etc/php/7.2/cli/conf.d/20-fileinfo.ini
    - /etc/php/7.2/cli/conf.d/20-ftp.ini
    - /etc/php/7.2/cli/conf.d/20-gettext.ini
    - /etc/php/7.2/cli/conf.d/20-iconv.ini
    - /etc/php/7.2/cli/conf.d/20-json.ini
    - /etc/php/7.2/cli/conf.d/20-mbstring.ini
    - /etc/php/7.2/cli/conf.d/20-phar.ini
    - /etc/php/7.2/cli/conf.d/20-posix.ini
    - /etc/php/7.2/cli/conf.d/20-readline.ini
    - /etc/php/7.2/cli/conf.d/20-shmop.ini
    - /etc/php/7.2/cli/conf.d/20-simplexml.ini
    - /etc/php/7.2/cli/conf.d/20-sockets.ini
    - /etc/php/7.2/cli/conf.d/20-sysvmsg.ini
    - /etc/php/7.2/cli/conf.d/20-sysvsem.ini
    - /etc/php/7.2/cli/conf.d/20-sysvshm.ini
    - /etc/php/7.2/cli/conf.d/20-tokenizer.ini
    - /etc/php/7.2/cli/conf.d/20-wddx.ini
    - /etc/php/7.2/cli/conf.d/20-xmlreader.ini
    - /etc/php/7.2/cli/conf.d/20-xmlwriter.ini
    - /etc/php/7.2/cli/conf.d/20-xsl.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

Installation failed, deleting ./composer.json.

这是否意味着 PHP 没有安装？

Answer 1

查看 Laravel 要求：

PHP >= 7.1.3
OpenSSL PHP Extension
PDO PHP Extension
Mbstring PHP Extension
Tokenizer PHP Extension
XML PHP Extension
Ctype PHP Extension
JSON PHP Extension

你见过他们吗？您的错误消息指出，您的环境不符合 PHP 版本和扩展，因此您必须先安装它们。安装正确的 PHP 版本和相应的扩展后，composer 将能够根据需要安装 laravel。

希望对您有所帮助！ :)

Answer 2

只是运行 sudo apt-get install php7.2-zip && sudo apt-get install php-zip。之后您将再次运行命令 (sudo composer global require "laravel/installer")。

它应该工作得很好。

它确实做到了。 :)

Answer 3

如果你尝试

sudo apt-get install php7.2-zip

而你运行进入错误:

sudo: apt-get: command not found

然后，用自制软件试试：

brew install php

这对我有用。希望它能为某人节省几分钟的额外挠头 :) 编码愉快！

Composer install Laravel：无法将您的要求解析为一组可安装的软件包

Composer install Laravel: Your requirements could not be resolved to an installable set of packages

php

laravel

composer-php

php-7.2